Green Mountain 10/22 Barrels

Green Mountain 10/22 Barrels are high grade target barrels with tight
fitting bore/groove dimensions and close fitting Bentz target-style chambers. We offer a variety of features in order to
fine-tune your Ruger 10/22 to suit any ammunition or shooting situation.GM522/523 20" - These are 20" fluted .920 dia. bull barrels with
the Bentz target
chamber and all purpose 1:16 rifling twist. Best for standard and hi velocity ammo.
Not recommended for Stinger ammo.GM503 16½" - These are 16½" fluted .920
dia. bull barrels with the Bentz target chamber and all purpose 1:16 rifling
twist. Best for standard and high velocity ammo. Not recommended for Stinger ammo.GM600/610 20" - These are 20" fluted .920 dia. Bull barrels with
target chambers and special purpose rifling twists. The GM600
1:9 rifling is best for slow, Subsonic ammo.
The GM610 1:18 rifling and long chamber is best for hyper velocity "Stinger" ammo.

What is a "Bentz" target style
chamber? Basically it is a tighter fitting chamber, designed to
align your ammo straighter and more consistently than the generic SAAMI
22LR chambers that mass production guns come with. The Bentz is
especially suited to semi-auto firearms like the Ruger 10/22 because it
retains enough clearance for reliable feed and ejection. A Bentz chamber
will fit most standard and hi velocity 22 LR ammo BUT NOT STINGERS.

What You Need to Know... You can upgrade your Ruger
10/22 quickly and easily if you remember a few simple points. First, these are .920 diameter bull barrels. They have no
taper and are most likely too wide to fit in your original factory Ruger 10/22 stock. The easiest (and most fun)
solution to this is to replace the stock with something exotic and adult sized. We have several options on our Ruger 10/22 Stocks page. Second, you can't realize the full accuracy
potential of these gun barrels unless you use a parallax adjustable riflescope. We have an explanation and can
recommend several several good scopes and scope mounts on our Ruger 10/22 Scopes and
Mounts webpage.

Finally, we have some straight forward barrel installation instructions
that should give you an idea of what's involved and what to consider. Good luck and Good Shooting!